These days, many offices and other workspaces are nearly empty as employees work from home. This can make companies that don’t safeguard their computers, printers and other equipment vulnerable to theft from outsiders. Even during normal times, businesses often lose assets because crooked employees walk out with them. Here’s how to protect valuable property — no matter who’s eyeing it. Asserting ownership First, claim your business’s assets. This means adding security plates and indelible identity markings to machines. These additions can help you track stolen equipment, inhibit resale and discourage thieves from trying to steal in the first place. Security software can help you track stolen computers online. As soon as the thief connects to the Internet, the computer’s software contacts a security firm’s monitoring system, which traces...